I dont think they have updated the trial versions plugin yet.
With the paid-pro version, I have tested it on wordpress 2.5.1 and it does integrate - not sure of the differences between semiologics version.

I got my site up and running, behind .htaccess protection, waiting until I get a membership thingies to work.

I simply try to limit the access for only paying members. Anyone can see some pages but only those who pay for membership can log in, vote, comment and read all the posts.

After installing the trial version of aMember it doesn't seem to work with WordPress 2.5. I'm not sure if I got everything installed correctly, but I suppose so.

Rebuilding User Db doesn't find any users and the site seems "unaffected" by aMembers presence.

I feel uncertain of paying for the software before I know if it works, is it possible to get some sort of updated WordPress plugin for the trial version?
All the options and possibilities aMember offers seem great, I just need to get it work first :b

(edit: I could use other CMS than WordPress. I chose it because I'm familiar with it. If there is other really simple ones, please suggest